Lock mechanism.



PATENTED DEC. 18, 1906.

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B. PHELPS. LOCK MECHANISM. APPLICATION FILED APB.14.1905.

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I B. PHELPS. LOOK MECHANISM.

APPLICATION FILED APB..14,1905.

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BYRON PHELPS, OF SEATTLE, WASHINGTON.

LOCK MECHANISM.

Specification of Letters Patent.

Patented Dec. 18, 1906.

Application filed April 14. 1905. Serial No. 255.477-

To all whom, it may concern.-

Be it known that I, BYRON PHELrs, a citizen of the United States,residing at Seattle, King county, State of Washington, have inventedcertain new and useful Improvements in Look Mechanism, of which thefollowing is a full, clear, and exact description.

My invention relates to improvements in look mechanism. Letters PatentNo. 769,769, granted me September 13, 1904, illustrates lock mechanismof the same general character. The improvements herein referred torelate more particularly to an improved form of dogging device, ornight-latch and setting mechanism therefor.

In the drawings, Figure 1 shows a lock mechanism embodying my inventionas applied to a fragment of the edge of a door.

Fig. 2 is a plan view of the lock mechanism I with the night-latch andshowing part of the construction in cross-section, the outer knob beinglocked. Fig. 3 is a plan view showing the parts released so that thelatchbolt may be operated by either knob. Fig. 4 is a cross-sectionalview showing certain details of construction in elevation.

In the particular form shown herein the latch-bolt is operated by twoknobs, the outer one of which carries a cylinder-lock for permitting theretraction of the latchbolt when the outer knob itself is dogged orlocked against rotation. The night-latch mechanism, so called, is setand released alternately by giving to the latch-bolt a supplemental orabnormal repression beyond the face of the end plate. .The limit of thenormal repression of the latch-bolt produced by the closing of the doorat which time the latch-bolt encounters the usual striker-plate isrepresented by the face of the end plate through which said latch-boltprojects. It is by manually repressing the latch-bolt itself to a stillgreater extent when the door is open that the night-latch mechanism ordogging mechanism is set or released. By this means the latch-bolt willbe seen to perform two functions-to wit, first, the usual one of holding the door when closed, and, second, the novel one of serving as anoperating means user to throw the night -latch or dogging mechanism intoor out of action.

1 is the fragment of the door to which the lock is attached.

2 and 3 are the inner and outer knobs, respectively.

4 and 5 are the inner and outer escutcheonplates.

6 is a frame carrying the operating mechamsm.

7 is the end plate of the frame.

8 is the latch-bolt pivoted to the frame.

9 and 10 are the shanks of the inner and outer knobs, respectively.

11 and 12 are tubular extensions from the frame 6, serving as guides andsupports for the knob-shanks.

13 is the latch-slide.

14 is a spring for normally extending the latch-bolt.

15 and 16 are roll-backs operated by the inner and outer knobshanks,respectively.

17 is the spindle of a cylinder-lock, which extends freely through anenlarged opening in the roll-back 16, but fitting into the rollback 15serves to operate the latch-slide through the medium of the innerknob-shank when the outer knob-shank is dogged and the lock-plug isturned, as customary, by means of a key.

18 is a dogging-bolt slidable in a portion of the frame 6 and adapted tofit into a recess or opening in the outer knob-shank 10 for preventingthe rotation of the same when it is desired to lock the door.

19 is a slide for the dogging-bolt suitably guided in the frame.

20 is a tilting-lever pivotally carried by the frame 6 and having aslotted portion engaging a pin 21, carried by the doggingslide 19.

22 and 23 are arms pivotally carried by the tilting-lever 20 andnormally resting upon the bridge 24, which supports their outer ends.

25 is a spring for holding the operatingarms 22 and 23 yieldingly inposition.

26 and 27 are inclined projections carried I when the door is open forpermitting the 0 by the operating-arms 22 and 23, respectively, whichare adapted to mutually cooperate with each other.

28 is a spring for engaging in one of two notches in the tilting-leverfor holding the tilting-lever definitely in either the position shown inFig. 2 or that shown in Fig. 3, with the dogging-bolt engaging the outerknobshank or disengaged. therefrom, as is desired.

When the parts are in the position shown in full lines in Fig. 3, thelatch-bolt may be retracted by the operation of either knob, thedogging-bolt 18 being retracted. The dog ging-bolt may, however, bethrown into engagement with the outer knob-shank by simply pressing inthe latch-bolt 8 beyond the face of the end plate into the positionshown in full lines in Fig. 2. Such operation causes the back of thelatch-bolt to engage the end of the arm 23 and tilt the lever 20 toforce the dogging-slid e 19 and dog 18 into the position shown in Fig.2. As the arm 23 moves inward the arm 22 is moved. outward, and theinclined member 26 rid es up the upper I surface of-the inclined member27, so as to raise the outer end of the arm 22 above the upper edge ofthe latch-bolt 8 and free therefrom. When the latch-bolt is released, itreturns to its outwardly-protruding position by virtue of the pressureof the spring 14 and permits the arm 22 to fall to its normal position.When it is desired to release the dogging-bolt 18, the latch-bolt 8 isagain pressed inward, engaging the end of the arm 22, which is thusmoved inward. The incline 27, riding up the incline 26, raises the arm23 clear of the latch-bolt 8, permitting the full inward movement of thelatter for releasing the dogging-bolt, as shown in Fig. 4.

The operation and construction of the mechanism are simple, and it hasthe particular advantage of small number of parts and inaccessibility totampering. The ordinary closing of the door throws the latch-bolt 8 toposition shown dotted in Fig. 3, which does not affect either of thetilting-arms 22 or 23.

What I claim is 1.. In a lock mechanism, the combination of a latchbolt,operating means therefor, and a dogging device for said operating meansand means operable by the latch-bolt for moving the dogging device, saiddogging device being operable by a supplemental repression of saidlatch-bolt.

2. In a lock mechanism, a dogging device, a tilting lever, movable armsoperatively connected thereto, a movable operating member adapted toalternately engage said arms to rock said tilting lever and move saiddogging device into the locking and. unlocking position alternately, andoperative connections between said dogging device and said tiltinglever.

3. In a lock mechanism, an inner and an outer knob, a dogging device forthe outer knob, a latch-bolt, and means of connection between saiddogging device and said latchbolt whereby by a supplemental movement ofsaid latch-bolt said dogging device is actuated to lock or unlock saidouter knob.

4. In a lock mechanism, a dogging device, a pair of movable arms,cooperating projections carried by said arms, operative connectionsbetween said arms and said dogging device, and a movable operatingmember -co acting with said, arms to. alternately move said doggingdevice into the locking and unlocking position.

5. In a lock mechanism, a dogging device, a tilting lever'operativelyconnected therewith, a pair of arms carried by said tilting lever onopposite sides of the center, inclined cooperable portions carried bysaid arms, and manuallycontrolled operating means for engaging said armsto tilt said lever, said inclines cooperating to free one of said armswhile the other is being repressed by said manually-controlled operatingmeans.

6. In a lock mechanism, a latch-bolt, two independent knobs cooperatingtherewith, a dogging device arranged to lock andunlock one of said.knobs, a tilting lever operatively connected with said dogging device, apair of arms connected to said. tilting lever on opposite sides of thecenter, said arms being ar ranged to be operated by said latch-bolt alternately upon the abnormal repression of said latch-bolt.

7. In a lock mechanism, a spring-pressed latch-bolt, means forretracting the same, a dogging device for said retracting means, andoperative connections between said latchbolt and said dogging meanswhereby the latter may be operated by a supplemental movement of said.latchbolt.

8. In a lock mechanism, a spring-pressed pivoted latch-bolt, means forretracting the same, a dogging device for said retracting means, andoperative connections between said latch-bolt and said dogging meanswhereby the latter may be operated by a supplemental movement of saidlatch bolt.

9. In a lock mechanism, the combination of a latch-bolt, operating meanstherefor, a dogging device for said. operating means, and means forsetting the dogging device in the locked position by a supplementalmanual operation of the latch-bolt.

10. In a lock mechanism, the combination of a latch-bolt, operatingmeans therefor, a dogging device for said operating means, and

means for releasing the dogging device from the locked position by asupplemental manual operation of the latch-bolt.

11. In a lock mechanism, a latch-bolt, a knob, operative means ofconnection between said latch-bolt and said knob, a dogging device forpreventing the retraction of said latch-bolt by said knob, and means foroperating said dogging device, said means being operated by asupplemental manual operation of the latch-bolt.

12. In a lock mechanism, a latch-bolt, a

